Susceptibility of Staphylococcus epidermidis to Argon Cold Plasma Jet by Oxygen Admixture

Abstract

Cold atmospheric pressure sterilization is one of the nominated and efficient techniques to prevent the spread of diseases. Reactive species such as O and OH and other radicals play a major role in the mechanism of plasma sterilization. Therefore, in this work, oxygen was mixed with different parentage from (0.2 to1.2%) to argon to enhance the generation of the reactive species and increase the argon atmospheric pressure plasma sterilization efficacy. The emission spectra from the jet increase the radicle line intensities by increasing the percentage admixture of O2 with the argon gas to reach a maximum power at 0.8; then, it gradually decreases with a higher O2 percentage. The OH band intensity decreases with increasing the admixture of O2. The jet with different O2 percentages was tested against Gram-positive S. epidermidis, which is the causal agent of nosocomial infections. The maximum reduction in colony-forming units (CFU) was observed at 0.2% O2. No bacterial growth was observed at the later concentration applied for 8 min and the same case was detected at 0.4% O2 applied to 16 min.

Characterization and Evaluation of Cold Atmospheric Plasma as Seedborne Fungal Disinfectant and Promoting Mediator for Physico-Chemical Characteristics of Moringa Oleifera Seedlings

“…The variety of these constituents contributes to its several pharmacological uses [3]. Moringa species were reported to have several biological impacts such as antioxidant activities [4], anticonvulsant [5], anticancer [6], antibacterial [7], antifungal [8], antiviral [9], antitrypanosomal [10], antileishmanial [11], antihyperglycemic, antihyperlipidemic, and hypocholesterolemic [12], antifertility [13], anti-in ammation [14], and antihypertension [15].…”

The shift in the laminar‐to‐turbulent transition flow mode in atmospheric pressure plasma jet

“…Third, it can be used with biological samples and heat‐sensitive materials as it is a cold and nonlethal plasma. [ 5,6 ] Fourth, it is a very flexible system where it comes in the form of a pen connected to a gas cylinder and power source. This shape gives researchers easy access to their aimed targets.…”